Superheating

—In steam engineering, the practice of heating steam to a temperature above that due to its pre ure. According to Barrus, who has made many engine and boiler tests, the saving in feed water for engines operating with superheated steam is about one per cent. for every eleven degrees of superheat. Superheating has been very succe fully introduced in steam automobiles. According to tests of Prof. Carpenter, the White engine working with highly superheated steam, operates on le than eleven pounds of water per hour per brake horsepower, a performance only approached by large compound condensing Corli engines, and quadruple expansion pumping engines.